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Note: the code implementation of this article uses JS (JavaScript) to provide problem-solving ideas for small partners who want to use js to practice algorithms and data structures in the front end. describe In a small town, number n people from 1 to n. It is rumored that one of these people is a secret judge in the town. If the town judge re ...

1 binary and octal representations ES6 provides a new writing method, which is represented by prefixes 0b (or 0b) and 0o (or 0o) respectively. 0b11110111 === 503 // true 0o767 === 503 // true Starting from ES5, in strict mode, octal values are no longer allowed to be represented by prefix 0. ES6 further clarifies that they are represent ...

LayUI overview It is similar to Bootstrap, but the framework has a great advantage that it defines many style interfaces for front-end and back-end interaction, such as paging tables. It only needs to configure the interface at the front end, and the back end returns data according to the defined interface rules to complete the page display, w ...

post interface without parameters const express = require('express'); const app = express(); app.post('/api/post', function(req, res) { // Direct return object res.send({ name: 'abc' }); }); app.listen('8088', () => { console.log('8088'); });   After starting the terminal, use postman to test the post interface~     I ...

JavaScript object An object is a collection of related data and methods (usually composed of some variables and functions, which we call attributes and methods in an object) 1. Object creation Literal mode var obj = { name:'TTTony', age:21, sayName:function(){ console.log(this.name); } } Constructor Pattern var obj = new Object(); ...

1. Type conversion ① How to convert to a string //Three ways to convert strings //null and undefined have no tostring() method var num=1; var str1=num.toString(); var str2=String(num);   //'1' of string type var s=1+''; console.log(str1,str2,s); ② Convert other types to strings var na=NaN; var u=undefined; var n=null; var bool=true; var arr ...

JavaWEB notes 18 Vue components 1, Introduction to components: Component: component-based development: each piece of the page is regarded as a separate part and assembled by the userComponentization: standard, divide and conquer, reuse, combinationVue implements partial component-based development at design time Define global and local ...

In JavaScript, almost all objects are instances of object type, and they inherit properties and methods from Object.prototype. The object constructor creates an object wrapper for the given value. Object constructor, which creates an object based on the given parameters. If the given value is null or undefined, an empty object is created a ...

Vue Instance Initialization Option mix Initial Merge & Option Normalization Check (This 2005 word will take about 25-35 minutes) 1.Vue Instance Initialization Option mix initial merge (detailed merge will be mentioned in subsequent articles, if you need to view merge policy, please bypass the article-) The merge is then mounted into the i ...

What are the methods for JS data type detection What are the data types in JavaScript In JavaScript, data types are divided into primitive and object types Raw data types include String: Represents a string, for example:'jingzhi'Number: Represents a numeric value, for example, 123Boolean: Represents a Boolean type of data with two values tru ...